WIP:Add CXR8 Dataset, Improves resource logging, Deprecates SSL, Adds tensorsboard support

This MR contains some important additions:

• Adds the CXR8 dataset and segmentations as input source for training lung segmentation on CXR, including specific versions for Idiap usage
• Fixes CPU logging (missing recurse=True setting)
• Improves CPU/GPU logging by consulting devices in a parallel process, during the whole epoch
• Fine-tunes train-analysis plot, adds a plot for hardware utilisation through training
• Deprecates Semi-supervised Learning (SSL) approaches due to changes in the overall re-design and infrastructural changes
• Added plumbery to support tensorboard logging
• Parallelises the evaluation procedure so it may be faster on very large datasets
• Change the flag --multiproc-data-loading to --parallel as it now can be used through the whole experiment
• Implements plot axes limits for the compare (portion of the experiment) script
• Adjusts the root of lung segmentation datasets (Montgomery, Shenzhen, JSRT) to make running a bit easier to reproduce remotely
• Fixes the loading of Montgomery and Shenzhen datasets to avoid resizing distortions